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January Weather in Rockford, United States

Last updated: June 24, 2025

In Rockford, United States, the average temperature in January hovers around -5°C (23°F), with the mercury dipping as low as -31°C (-24°F) and peaking at 13°C (56°F). Expect 60 mm (2.4 in) of precipitation spread over 7 days, accompanied by a high average humidity of 85%.

January Temperature in Rockford

In January in Rockford, the average temperature is -5°C (23°F), with maximums reaching 13°C (56°F) and minimums dropping as low as -31°C (-24°F). Travelers should be prepared for significant temperature fluctuations and dress accordingly to enjoy their visit.

January Weather in Rockford: Daily Temperature Highs, Lows, and Averages

The chart illustrates January temperature patterns in Rockford, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Rockford, January typically has an average temperature of -5°C (23°F), with highs reaching up to 13°C (56°F) and lows dropping to around -31°C (-24°F).
JanFebMarAprMayJunJulAugSepOctNovDec232538476072757267533731
Data source: Temperature data for Rockford generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

January Precipitation in Rockford

In Rockford in January, the precipitation amount is 60 mm (2.4 in) over the course of 7 days.

January Precipitation Trends in Rockford

The chart displays monthly precipitation patterns in Rockford, with values for each month alongside January’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how January’s conditions compare to those of other months. In Rockford, January typically receives around 60 mm (2.4 inches) of precipitation spread over approximately 7 days.
JanFebMarAprMayJunJulAugSepOctNovDec60557010215611174811101124850
Data source: Precipitation data for January generated using information from the Copernicus Climate Change Service.
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January Humidity in Rockford

In Rockford in January, humidity is 85%. With an average temperature of -5°C (23°F), this humidity feels like a biting chill that clings to your skin, making even the briefest outdoor excursions feel daunting and uncomfortable.

January Average Humidity in Rockford

This chart illustrates the average monthly humidity levels in Rockford, with January’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In January, average humidity in Rockford is approximately 85%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec85%85%85%85%78%80%78%76%79%83%88%82%
Data source: Humidity data for January generated using information from the Copernicus Climate Change Service.

January UV Index in Rockford

In Rockford in January, the maximum UV index is 3, which corresponds to a moderate Exposure Category. The time to burn is approximately 30 minutes. For more details on the hourly UV index in Rockford, you can check the information here.

Maximum UV Index Levels in Rockford for January

The chart shows the monthly maximum UV Index (UVI) for Rockford in January, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In January, the maximum UV index in Rockford typically reaches 3, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec34689101098532
Data source: Rockford January UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

How January Weather in Rockford Compares to Other Months

Weather in Rockford varies notably across the year, with each month offering distinct climate conditions. This page compares January’s weather to other months in Rockford, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Rockford, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-5°C (23°F)60 mm (2.4 inches)85%moderate
February Weather-4°C (25°F)55 mm (2.2 inches)85%moderate
March Weather3°C (38°F)70 mm (2.8 inches)85%high
April Weather9°C (48°F)102 mm (4.0 inches)85%very high
May Weather16°C (61°F)156 mm (6.1 inches)78%very high
June Weather22°C (72°F)111 mm (4.4 inches)80%very high
July Weather24°C (76°F)74 mm (2.9 inches)78%very high
August Weather22°C (73°F)81 mm (3.2 inches)76%very high
September Weather19°C (67°F)110 mm (4.3 inches)79%very high
October Weather12°C (53°F)112 mm (4.4 inches)83%moderate
November Weather3°C (38°F)48 mm (1.9 inches)88%moderate
December Weather0°C (31°F)50 mm (2.0 inches)81%low

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